Question

what is the answer for this question? pls send the answer with steps

Answer 1

Hey There!

Here, $Al_2(SO_4)_3$ undergoes dissociation in solution, as follows: $Al_2(SO_4)_3 \rightarrow 2 Al^{3+}+3SO_4^{2-}$

So, from one molecule of $Al_2(SO_4)_3$, 5 individual molecules are formed from dissociation. 
So, n=5
Also, $\alpha=50\% =0.5$

Now, van't Hoff factor is given as:

$i=1+\alpha(n-1) \\ \\ \implies i=1+(0.5)(5-1)=1+2 \\ \\ \implies \boxed{i=3}$
Hope it helps
Purva

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